valley free routing?

Fri Mar 7 02:23:42 UTC 2014

On Wed, Mar 5, 2014 at 12:23 PM, William Herrin <bill at herrin.us> wrote:

> Hi folks,
>
> Can anyone tell me about a situation in which a route which was not
> valley free was not a result of a misconfiguration or a bad actor? For
> those who don't recall the terminology, a network path is valley free
> if it crosses exactly zero or one free peering links when traveling
> between the two endpoints.
>

Isn't that the way most of the IPv6 internet ran
for many years?   ISP A -> 6939 <- ISP B,
settlement-free connections all around?  It's
what established 6939 as the core of the
IPv6 internet.

Matt

>
> Thanks,
> Bill Herrin
>
>
> --
> William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
> 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
> Falls Church, VA 22042-3004
>
>